Add Pi Keyboard code node

nodes/core/hardware/36-rpi-gpio.html

@@ -366,3 +366,37 @@
         }
     });
 </script>
+
+<script type="text/x-red" data-template-name="rpi-keyboard">
+    <div class="form-row">
+        <label for="node-input-name"><i class="fa fa-tag"></i> <span data-i18n="common.label.name"></span></label>
+        <input type="text" id="node-input-name" data-i18n="[placeholder]common.label.name">
+    </div>
+</script>
+
+<script type="text/x-red" data-help-name="rpi-keyboard">
+    <p>Raspberry Pi keyboard handling node. Requires a USB keyboard.</p>
+    <p>Generates a <b>msg.payload</b> with a keycode, and <b>msg.action</b> set to
+    <i>up, down</i> or <i>repeat</i> whenever a key is pressed or released.</p>
+    <p>It also sets <b>msg.topic</b> to <i>pi/key</i>.</p>
+</script>
+
+<script type="text/javascript">
+    RED.nodes.registerType('rpi-keyboard',{
+        category: 'Raspberry Pi',
+        label: 'Raspberry Pi',
+        color:"#c6dbef",
+        defaults: {
+            name: { value:"" }
+        },
+        inputs:0,
+        outputs:1,
+        icon: "rpi.png",
+        label: function() {
+            return this.name||this._("rpi-gpio.label.pikeyboard");;
+        },
+        labelStyle: function() {
+            return this.name?"node_label_italic":"";
+        }
+    });
+</script>

nodes/core/hardware/36-rpi-gpio.js

@@ -273,6 +273,54 @@ module.exports = function(RED) {
     }
     RED.nodes.registerType("rpi-mouse",PiMouseNode);
 
+    function PiKeyboardNode(n) {
+        RED.nodes.createNode(this,n);
+        var node = this;
+
+        node.child = spawn(gpioCommand, ["kbd","0"]);
+        node.status({fill:"green",shape:"dot",text:"common.status.ok"});
+
+        node.child.stdout.on('data', function (data) {
+            var b = data.toString().trim().split(",");
+            var act = "up";
+            if (b[1] === "1") { act = "down"; }
+            if (b[1] === "2") { act = "repeat"; }
+            node.send({ topic:"pi/key", payload:Number(b[0]), action:act });
+        });
+
+        node.child.stderr.on('data', function (data) {
+            if (RED.settings.verbose) { node.log("err: "+data+" :"); }
+        });
+
+        node.child.on('close', function (code) {
+            node.child = null;
+            node.running = false;
+            if (RED.settings.verbose) { node.log(RED._("rpi-gpio.status.closed")); }
+            if (node.done) {
+                node.status({fill:"grey",shape:"ring",text:"rpi-gpio.status.closed"});
+                node.done();
+            }
+            else { node.status({fill:"red",shape:"ring",text:"rpi-gpio.status.stopped"}); }
+        });
+
+        node.child.on('error', function (err) {
+            if (err.errno === "ENOENT") { node.error(RED._("rpi-gpio.errors.commandnotfound")); }
+            else if (err.errno === "EACCES") { node.error(RED._("rpi-gpio.errors.commandnotexecutable")); }
+            else { node.error(RED._("rpi-gpio.errors.error")+': ' + err.errno); }
+        });
+
+        node.on("close", function(done) {
+            node.status({});
+            if (node.child != null) {
+                node.done = done;
+                node.child.kill('SIGINT');
+                node.child = null;
+            }
+            else { done(); }
+        });
+    }
+    RED.nodes.registerType("rpi-keyboard",PiKeyboardNode);
+
     RED.httpAdmin.get('/rpi-gpio/:id', RED.auth.needsPermission('rpi-gpio.read'), function(req,res) {
         res.json(pitype);
     });

nodes/core/hardware/nrgpio.py

@@ -15,7 +15,10 @@
 
 # Import library functions we need
 import RPi.GPIO as GPIO
+import struct
 import sys
+import os
+import subprocess
 
 bounce = 20     # bounce time in mS to apply
 
@@ -193,6 +196,29 @@ if len(sys.argv) > 2:
                 file.close()
                 sys.exit(0)
 
+    elif cmd == "kbd":  # catch keyboard button events
+        try:
+            while not os.path.isdir("/dev/input/by-path"):
+                time.sleep(10)
+            infile = subprocess.check_output("ls /dev/input/by-path/ | grep -m 1 'kbd'", shell=True).strip()
+            infile_path = "/dev/input/by-path/" + infile
+            EVENT_SIZE = struct.calcsize('llHHI')
+            file = open(infile_path, "rb")
+            event = file.read(EVENT_SIZE)
+            while event:
+                (tv_sec, tv_usec, type, code, value) = struct.unpack('llHHI', event)
+                #if type != 0 or code != 0 or value != 0:
+                if type == 1:
+                    # type,code,value
+                    print("%u,%u" % (code, value))
+                event = file.read(EVENT_SIZE)
+            print "0,0"
+            file.close()
+            sys.exit(0)
+        except:
+            file.close()
+            sys.exit(0)
+
 elif len(sys.argv) > 1:
     cmd = sys.argv[1].lower()
     if cmd == "rev":
@@ -200,8 +226,8 @@ elif len(sys.argv) > 1:
     elif cmd == "ver":
         print GPIO.VERSION
     else:
-        print "Bad parameters - in|out|pwm|buzz|byte|borg|mouse|ver {pin} {value|up|down}"
+        print "Bad parameters - in|out|pwm|buzz|byte|borg|mouse|kbd|ver {pin} {value|up|down}"
         print "  only ver (gpio version) and rev (board revision) accept no pin parameter."
 
 else:
-    print "Bad parameters - in|out|pwm|buzz|byte|borg|mouse|ver {pin} {value|up|down}"
+    print "Bad parameters - in|out|pwm|buzz|byte|borg|mouse|kbd|ver {pin} {value|up|down}"

nodes/core/locales/en-US/messages.json

@@ -568,6 +568,7 @@
             "initpin": "Initialise pin state?",
             "button": "Button",
             "pimouse": "Pi Mouse",
+            "pikeyboard": "Pi Keyboard",
             "left": "Left",
             "right": "Right",
             "middle": "Middle"